$(function(){
  // get elem
  let btn = $('input'),
      delay = 6,
      timer = null;
  // init status:disable,text,delay
  btn.val('同意('+delay+'s)');
  btn.attr('disabled','disabled');
  // start timer,timeout button enable
  timer = setInterval(()=>{
    //delay > 0
    //set btn text
    //delay--
    //delay = 0 => set btn enable
    btn.val('同意('+delay--+'s)');
    if (delay === 0){
      clearInterval(timer);
      btn.val('同意');
      btn.removeAttr('disabled');
    }
  },1000)
// click event
  btn.click(()=>{
    alert('button clicked!')
  })
//
});
